Retell AI Voice Agents

Retell AI offers a voice AI platform for building AI voice agents without code. Its terms list the legal entity Retell AI Inc. at Redwood City, California, and its about page notes the team joined Y Combinator in November 2023.

The platform covers building (call transfer, appointment booking, knowledge base, IVR navigation), deploying (batch calls, branded caller ID, verified numbers) and monitoring (post-call analysis, AI quality assurance). The newsroom lists 2026 recognition including Wing VC Enterprise Tech 30 in April and a Brex growth ranking in August, with Everise and Anker as case studies.

• Call transfer: hands calls to human staff when needed.
• Appointment booking: agents schedule appointments during calls.
• Knowledge base: agents answer from uploaded business content.
• IVR navigation: agents navigate phone menus on outbound calls.
• Batch calls: runs outbound campaigns with branded caller ID.
• Post-call analysis: AI quality assurance on completed calls.

An insurer in Vietnam runs outbound renewal reminder calls. A logistics firm confirms deliveries by batch calls. A clinic books appointments through an AI receptionist.

No-code agent building shortens time to launch.

Batch calling and branded caller ID support outbound campaigns.

Post-call analysis and AI quality assurance support monitoring.

ISO/IEC 27001 badge and HIPAA compliance page are shown on the site.

Phone remains a primary support and sales channel, and no-code voice AI lowers the barrier to automate it. Debt collection, logistics, insurance and healthcare operators in Vietnam and Southeast Asia run high call volumes suited to batch outbound agents.

Y Combinator team from November 2023. Wing VC Enterprise Tech 30 (2026-04-03) and Brex Summer 2026 ranking (2026-08-17) per the newsroom. Legal entity Retell AI Inc., Redwood City, California.